以三水合硝酸铜[Cu(NO3)2·3H2O)]、均苯三甲酸(H3BTC)、纳米氧化锌(ZnO)、聚乙烯吡咯烷酮(PVP)为原料,在室温下快速制备了铜基金属-有机框架材料——聚乙烯吡咯烷酮/1,3,5-均苯三羧酸铜(PVP/Cu-BTC)。采用傅里叶变换红外光谱仪、X射线衍射仪和扫描电子显微镜等表征了PVP/Cu-BTC的化学组分、晶体结构和形貌,并研究了PVP/Cu-BTC的水稳定性能以及对亚甲基蓝的吸附性能。结果表明,PVP可以提高Cu-BTC的水稳定性,将其浸泡在水中48h后结构不会发生坍塌,且无论是在酸性还是碱性条件下,都可以保持结构的完整性。PVP也可以提高Cu-BTC对亚甲基蓝的吸附性能,PVP/Cu-BTC用量为0.5g/L时,对质量浓度10mg/L亚甲基蓝溶液吸附45min后脱色率达到83.1%。
Using copper nitrate trihydrate [Cu(NO3)2·3H2O)],pyromellitic acid (H3BTC),nano zinc oxide (ZnO) and polyvinylpyrrolidone (PVP) as raw materials,the copper-based metal-organic framework material PVP/Cu-BTC was rapidly prepared at room temperature.The chemical composition,crystal structure and morphology of PVP/Cu-BTC were characterized by Fourier transform infrared spectroscopy,X-ray diffraction and scanning electron microscopy.The water stability and adsorption of PVP/Cu-BTC towards methylene blue were studied.The results showed that PVP could improve the water stability of Cu-BTC,its structure did not collapse after soaking in water for 48 hours,and the structural integrity could be maintained whether in acidic or alkaline conditions.PVP could also improve the adsorption rate of Cu-BTC for methylene blue.When the dosage of PVP/Cu-BTC was 0.5g/L,the decolonization rate for 10mg/L methylene blue solution reached 83.1% after 45 minutes of adsorption.
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